EECS 1 Lecture Notes - Lecture 5: Digital Signal Processing, Optoelectronics, Materials Science
EECS – 18000 – Intro to EE & CPE
Week 5 – Lecture 5 – Intro to EE and CS
Ozdal Boyraz
• Summer 1995
• Came to US for graduate studies
o Interest in communications
• Time then
o A time when wireless communication was nonexistent
▪ Fiberoptic was blooming then
▪ Using lights for optical communication systems
o EE was a kind of area that was at an intersection with the materials side
▪ Physics and engineering, as well as materials science
EE
• Five specializations
o Electronic Circuit Design
o RF, Antennas, and Microwaves
o Semiconductors and Optoelectronics
o Digital Signal Processing
o Communications
Semiconductors and Optoelectronics
• General Perspective (Engineering)
o Most of what we are doing has something to do with transferring
phenomena
▪ Controlling the transport
▪ Designing a system that transports in a meaningful way or control
what is being transported and how to translate in a sensible way
o Engineering is based on transports
▪ Examples:
• Mass transport
o Physical objects being loaded and moved
• Charge transport
o Storing and transferring
• Energy transport
o Electromagnetic waves, light etc.
o Transporting this type of energy from one place to
another
• Ways to convey message
o Brain interprets the sounds carried over in a certain way
▪ Acoustic communication
find more resources at oneclass.com
find more resources at oneclass.com
▪ If there was no understanding of language, language would sound
like nothing more than random, unintelligible sounds
• But our brains have been trained to understand this type of
information, and so we understand it
o Electronic or Optical Signaling
▪ You can convey the same message by using electrons or light
▪ Electronic or optical systems make devices that can produce
meaningful result by controlling the electrons or photons (light)
▪ Light is transferred from one medium to another
▪ You are using the same method, but changing the changed particle
with mass, to an energy (photon) with no mass but energy to
convey a message
▪ These deal with devices that can control the flow of the photons
(light energy), and dealing with the generation of these particles,
the flow, and the detection of these particles to parse a special
message
• Semiconductors
o Conductors
▪ Typically metals
▪ Very good conductivity of electricity
▪ Electrons flow from one end to the other end with low loss
o Insulators
o In semiconductors, you can control the activity
▪ They are in between insulators and conductors and can navigate
between the two extremes
▪ Tunable materials in fabrication and when applied voltage to
• Or when applying a light
o Diodes
▪ Most basic devices you can make by using semiconductors
▪ It is a switch
• In positive voltage, it acts like a low resistance (a piece of
metal wire)
• At negative, behaves like an insulator, no current flows
• Is used as a rectifier – helps to convert sinusoidal signals to
DC signals
▪ Acts like a glass, and allows for flow control
▪ Is actually a mechanism with alternating currents that oscillate at
60Hz
• If you apply this, it will access the positive part of the signal
and the negative will be clipped
• Is used to convert the negative part of the conductor to a
different current
o Conducting an alternative current
find more resources at oneclass.com
find more resources at oneclass.com
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EECS 1 Full Course Notes
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Document Summary
Eecs 18000 intro to ee & cpe. Week 5 lecture 5 intro to ee and cs. Ozdal boyraz: summer 1995, came to us for graduate studies. Ee: five specializations, electronic circuit design, rf, antennas, and microwaves, semiconductors and optoelectronics, digital signal processing, communications. In positive voltage, it acts like a low resistance (a piece of metal wire: at negative, behaves like an insulator, no current flows. Is used as a rectifier helps to convert sinusoidal signals to. Dc signals: acts like a glass, and allows for flow control. Is actually a mechanism with alternating currents that oscillate at. If you apply this, it will access the positive part of the signal and the negative will be clipped. Incoming information is changed into semiconductor material: solar cells, diode devices without voltage applications, free running device. It"s quite a challenge for engineering: to be realized in the next few years. Impact: energy, more efficient devices for generation and also for consumption.